Former Argentina boss Marcelo Bielsa has quit as Lazio coach just two days after taking charge of the Italian club. The 60-year-old was named by Lazio on Wednesday as a replacement for Stefano Pioli, who was sacked in April. The Rome-based Serie A club announced on Friday that Argentine Bielsa had resigned but gave no other details. Lazio have not won the Italian title since 2000 and finished eighth last season.